Question

If the nth term of an A.P. is given by An=5n-3, then the sum of first 10 terms if
(a) 225
(b)245
(c)255
(d)270
Ans:(b) 245
Solve the above question to obtain the correct answer given.
( plz give a detailed explanation coz my question contains more points!)​

Answer 1

Step-by-step explanation:

hope you get the solution

Answer 2

A1=5-3=2

A10=50-3=47

Sn=n/2(a+an)

S10=10/2(2+47)

S10=5(49)

S10=245

hey mate here is your Answer

hope this helps